Ignition apparatus for aviation-engines



A. MAIRE.

IGNITION APPARATUS FOR AVIATION ENGINES.

APPLICATION FILED AUG. 9 I917.

Patented Apr. 19, 1921.

ATEN OFFICE,

AUG-USTE IMAIRE, OF ARGENTEUIL, FRANCE, ASSIGNOR T0 SOCIETE LORRAINE DESANCIENS ETABLISSEMEN TS DE DIETRICH & CIE. DE L'UNEVILLE, 0F PARIS,

FRANCE.

Specification of Letters Patent.

Patented Apr. 19, 1921.

Application filed August 9, 1917. Serial No. 185,242.

T 0 all whom it may concern:

Be it known that I, AUcUsTE MAIRE, citizen of the Republic of France,residing at Route de Bezons, Argenteuil, Seine and Oise, in the Republicof France, have invented new and useful Improvements in IgnitionApparatus for Aviation-Engines, of which the following is aspecification.

For the purpose of assuring greater security in the operation ofaviation engines, it is an advantage to assure ignition in each cylinderby the provision of two completely independent sparking plugs, whichprovision however necessitates providing two separate apparatus foreffecting the ignition.

The present invention has now for its object to provide an improvedapparatus that will allow of applying that arrangement to engines havingmore than six cylinders, with magnetos of any desired type.

The improved apparatus is characterized by the use of magnetos without adistributor having a suitable speed ratio according to the type ofmageto, the igniting current generated by these magnetos being led todistributers mounted on the supports for the cam shafts, thecarbon-brush holder being actuated by the cam shaft.

The accompanying drawing illustrates by way of example the applicationof an improved apparatus according to this invention to an aviationengine.

The improved apparatus comprises two magnetos of any type driven by theengine and giving two or four sparks at each revolution. It is to beunderstood of course that the ratio between the speed of the armatureand the speed of the engine main shaft will dependon the characteristicsof the magneto. If the secondary circuit of each magneto is connected toa distributer B mounted on the cam shaft, this arrangement will provldea complete ignition apparatus comprisng two magnetos and twodistributers formmg two circuits that are absolutely independent of eachother for the ignition of the engine.

Having now described my invention, what I claim as new and desire to.secure by Letters Patent is:

1. In ignition apparatus for aviation engines having a plurality ofcylinders and a plurality of spark plugs in each cylinder, thecombination with a plurality of magnetos driven from the crank shaft ofthe engine, of a plurality of distributers each adapted to be operatedby a different cam shaft of the engine, an electrical connection fromeach magneto to its corresponding distributer, .and an electricalconnection from each distributer to one of the spark plugs in eachcylinder, whereby a plurality of independent current supply means isprovided for the several spark plugs of each cylinder.

2. In an ignition apparatus for internal combustion engines, incombination, two magnetos, means for driving said magnetos, a pluralityof cam shafts, a distributer for each magneto and operated by one of thecam shafts, an electric connection between a magneto and a distributor,two spark plugs in each cylinder of the motor, and an electricconnection between each distributer and one of the spark plugs of eachcylinder, whereby if one system of ignition should fail to operate theother will operate.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

' AUGUSTE MAIRE. Witnesses:

LOUIS Moses,

Cues. P. PRESSLY.

